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/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** No Commercial Usage
**
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
**
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**************************************************************************/
#include "completionsupport.h"
#include "completionwidget.h"
#include "icompletioncollector.h"
#include <coreplugin/icore.h>
#include <extensionsystem/pluginmanager.h>
#include <texteditor/itexteditor.h>
#include <texteditor/completionsettings.h>
#include <utils/qtcassert.h>
#include <QtCore/QString>
#include <QtCore/QList>
namespace TextEditor {
CompletionSupport *CompletionSupport::instance()
{
static CompletionSupport *m_instance = 0;
if (!m_instance)
m_instance = new CompletionSupport;
return m_instance;
}
class CompletionSupportPrivate : public QObject
{
Q_OBJECT
public:
explicit CompletionSupportPrivate(CompletionSupport *support);
private slots:
void performCompletion(const TextEditor::CompletionItem &item);
void cleanupCompletions();
public:
QList<CompletionItem> getCompletions() const;
void complete(ITextEditor *editor, CompletionPolicy policy, bool forced);
CompletionSupport *m_support;
Internal::CompletionWidget *m_completionList;
int m_startPosition;
bool m_checkCompletionTrigger; // Whether to check for completion trigger after cleanup
ITextEditor *m_editor;
const QList<ICompletionCollector *> m_completionCollectors;
ICompletionCollector *m_completionCollector;
CompletionPolicy m_policy;
};
CompletionSupportPrivate::CompletionSupportPrivate(CompletionSupport *support) :
m_support(support),
m_completionList(0),
m_startPosition(0),
m_checkCompletionTrigger(false),
m_editor(0),
m_completionCollectors(ExtensionSystem::PluginManager::instance()
->getObjects<ICompletionCollector>()),
m_completionCollector(0),
m_policy(SemanticCompletion)
{
}
QList<CompletionItem> CompletionSupportPrivate::getCompletions() const
{
if (m_completionCollector)
return m_completionCollector->getCompletions();
return QList<CompletionItem>();
}
CompletionSupport::CompletionSupport()
: QObject(Core::ICore::instance()),
d(new CompletionSupportPrivate(this))
{
}
CompletionSupport::~CompletionSupport()
{
}
void CompletionSupportPrivate::performCompletion(const CompletionItem &item)
{
item.collector->complete(item, m_completionList->typedChar());
m_checkCompletionTrigger = true;
}
void CompletionSupportPrivate::cleanupCompletions()
{
if (m_completionList)
disconnect(m_completionList, SIGNAL(destroyed(QObject*)),
this, SLOT(cleanupCompletions()));
if (m_checkCompletionTrigger)
m_checkCompletionTrigger = m_completionCollector->shouldRestartCompletion();
m_completionList = 0;
m_completionCollector->cleanup();
if (m_checkCompletionTrigger) {
m_checkCompletionTrigger = false;
// Only check for completion trigger when some text was entered
if (m_editor->position() > m_startPosition)
complete(m_editor, m_policy, false);
}
}
bool CompletionSupport::isActive() const
{
return d->m_completionList != 0;
}
CompletionPolicy CompletionSupport::policy() const
{
return d->m_policy;
}
void CompletionSupport::complete(ITextEditor *editor, CompletionPolicy policy, bool forced)
{
d->complete(editor, policy, forced);
}
void CompletionSupportPrivate::complete(ITextEditor *editor, CompletionPolicy policy, bool forced)
{
m_completionCollector = 0;
foreach (ICompletionCollector *collector, m_completionCollectors) {
QTC_ASSERT(collector, continue);
if (collector->supportsEditor(editor)
&& collector->supportsPolicy(policy)) {
m_policy = policy;
m_completionCollector = collector;
break;
}
}
if (!m_completionCollector)
return;
m_editor = editor;
QList<CompletionItem> completionItems;
int currentIndex = 0;
if (!m_completionList) {
if (!forced) {
const CompletionSettings &completionSettings = m_completionCollector->completionSettings();
if (completionSettings.m_completionTrigger == ManualCompletion)
return;
if (!m_completionCollector->triggersCompletion(editor))
return;
}
m_startPosition = m_completionCollector->startCompletion(editor);
completionItems = getCompletions();
QTC_ASSERT(!(m_startPosition == -1 && completionItems.size() > 0), return);
if (completionItems.isEmpty()) {
cleanupCompletions();
return;
}
m_completionList = new Internal::CompletionWidget(m_support, editor);
connect(m_completionList, SIGNAL(itemSelected(TextEditor::CompletionItem)),
this, SLOT(performCompletion(TextEditor::CompletionItem)));
connect(m_completionList, SIGNAL(completionListClosed()),
this, SLOT(cleanupCompletions()));
// Make sure to clean up the completions if the list is destroyed without
// emitting completionListClosed (can happen when no focus out event is received,
// for example when switching applications on the Mac)
connect(m_completionList, SIGNAL(destroyed(QObject*)),
this, SLOT(cleanupCompletions()));
} else {
completionItems = getCompletions();
if (completionItems.isEmpty()) {
m_completionList->closeList();
return;
}
if (m_completionList->explicitlySelected()) {
const int originalIndex = m_completionList->currentCompletionItem().originalIndex;
for (int index = 0; index < completionItems.size(); ++index) {
if (completionItems.at(index).originalIndex == originalIndex) {
currentIndex = index;
break;
}
}
}
}
m_completionList->setCompletionItems(completionItems);
if (currentIndex)
m_completionList->setCurrentIndex(currentIndex);
// Partially complete when completion was forced
if (forced && m_completionCollector->partiallyComplete(completionItems)) {
m_checkCompletionTrigger = true;
m_completionList->closeList();
} else {
m_completionList->showCompletions(m_startPosition);
}
}
} // namespace TextEditor
#include "completionsupport.moc"
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